MOVING BODY MOUNTED DEVICE

A moving body mounted device includes: a body; a first attachment portion arranged on a first side in a first direction relative to the body, and attachable to a first attachment target member of a moving body; a second attachment portion arranged on a second side opposite to the first side in the first direction relative to the body, and attachable to a second attachment target member of the moving body; and a fixture for fixing the first attachment portion, the body, and the second attachment portion to each other. The first attachment portion and the second attachment portion are independently rotatable about an axis extending in the first direction relative to the body. The fixture enables each of the first attachment portion and the second attachment portion to be fixed in a desired rotational position relative to the body.